JP7145265B1 - Mounting structure of the cover member - Google Patents

Abstract

An object of the present invention is to provide a mounting structure for a cover member that suppresses looseness between the cover member and the mounting hole and allows the cover member to be easily mounted in the mounting hole. A mounting portion structure of a cover member (6) includes a plate member having a mounting hole (9), and a cover member (6) having a peripheral wall (11) and fixing the peripheral wall (11) to the mounting hole (9). The mounting hole 9 has a burring portion 10 on its peripheral edge. The outer peripheral surface of the peripheral wall 11 has a first engaging area that abuts on the burring processed portion 10 and a second engaging area that abuts on the burring processed portion 10 at a position facing the first engaging area on the circumference of the peripheral wall 11 . A stop area is provided. The first locking area is provided with a removal restricting portion that abuts on the extended end 10e of the burring portion 10 and an insertion restricting portion that abuts on the curved outer surface 10c of the burring portion 10 . The second locking region is provided with a bite restricting portion that restricts the displacement of the peripheral wall 11 by biting into the burring processed portion. [Selection drawing] Fig. 7

Description

TECHNICAL FIELD The present invention relates to an attachment structure for a cover member attached to an attachment hole of a plate member.

As a technique for attaching a seat belt retractor for a rear seat of a vehicle to a vehicle body, there is known a technique in which the retractor is housed in a concave cover member and the cover member is attached to a mounting hole of a plate member behind the rear seat. (See Patent Document 1, for example).

In the mounting portion structure of the cover member described in Patent Document 1, the peripheral wall of the cover member is fitted from above into the mounting hole formed in the plate member.

Japanese Patent No. 5244780

However, the structure of the mounting portion of the cover member described in Patent Document 1 is a structure in which the peripheral wall of the cover member is simply fitted into the mounting hole of the plate member from above, so there is a manufacturing error in the cover member and the mounting hole. In some cases, there is concern that looseness may occur between the cover member and the mounting hole.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a mounting structure for a cover member that suppresses looseness between the cover member and the mounting hole and allows the cover member to be easily mounted in the mounting hole.

In order to solve the above problems, the mounting structure of the cover member according to the present invention employs the following configuration.
That is, the mounting portion structure of the cover member according to the present invention includes a plate member having a mounting hole (for example, the support plate 3 in the embodiment) and a peripheral wall (for example, the peripheral wall 11 in the embodiment). and a cover member (for example, the cover member 6 of the embodiment) fixed to the hole, and the mounting hole has a curved burring portion (for example, the burring portion 10 of the embodiment) on the peripheral edge portion. The outer peripheral surface of the peripheral wall has a first locking region (for example, the first locking region A1 in the embodiment) that contacts the burring portion, and the first locking region on the circumference of the peripheral wall. A second locking region (for example, a second locking region A2 in the embodiment) abutting against the burring portion at a position facing each other is provided, and the first locking region includes the burring portion. A removal restricting portion (for example, the lower rib 15 in the embodiment) that abuts the extending end of the portion, and an insertion restricting portion (for example, the upper rib 14 in the embodiment) that abuts on the curved outer surface of the burring portion are provided. and a bite restricting portion (for example, the rib 20 of the embodiment) that restricts the displacement of the peripheral wall by being bitten by the burring portion is provided in the second locking region. .

With the above configuration, when the peripheral wall of the cover member is attached to the mounting hole of the plate member, the peripheral wall of the cover member is inserted into the mounting hole so as to face the curved distal end side of the burring portion. When the peripheral wall of the cover member is inserted into the mounting hole in this manner, the insertion restricting portion of the first engaging region of the peripheral wall contacts the curved outer surface of the burring portion, and the removal restricting portion of the first engaging region contacts the burring portion. abuts on the curved tip of the At this time, the burring portion bites into the bite restricting portion in the second locking region of the peripheral wall. The displacement restricting function of the biting restricting portion of the second locking area, coupled with the displacement restricting function of the insertion restricting portion and the disengagement restricting portion of the first locking area, strongly restricts the displacement of the peripheral wall of the cover member. . In addition, since the burring processing portion bites into the bite restricting portion of the second locking region, even if there are manufacturing errors in the mounting hole or the cover member, these errors can be absorbed, and the gap between the cover member and the mounting hole can be absorbed. It is possible to suppress sagging.

The contact surface (for example, the contact surface 20a in the embodiment) of the bite restricting portion with the burring portion is directed toward the inner side of the peripheral wall with respect to the insertion direction of the peripheral wall toward the curved distal end side of the burring portion. You may make it incline.

In this case, when the peripheral wall of the cover member is inserted into the mounting hole of the plate member at the time of assembly, the contact position with the burring processed portion is displaced along the inclination of the contact surface of the bite restricting portion. At this time, the pressure contact force of the burring portion against the contact surface of the bite restricting portion gradually increases. Therefore, the burring portion can be easily bitten by the biting restricting portion, and the cover member can be easily attached to the mounting hole. In this way, when the burring portion satisfactorily bites into the contact surface of the biting restricting portion, it is possible to reliably prevent the cover member from coming off from the mounting hole and rattling.

The detachment restricting portion and the insertion restricting portion are related to the insertion direction of the peripheral wall toward the curved distal end side of the burring portion, and the detachment restricting portion is disposed on the distal end side of the insertion restricting portion in the inserting direction. The contact surface of the removal restricting portion (for example, the contact surface 15a in the embodiment) that contacts the extending end of the portion, and the contact surface of the insertion restricting portion that contacts the curved outer surface of the burring portion ( For example, the contact surfaces 14a) of the embodiment may be provided so as to face each other in a direction crossing the insertion direction of the peripheral wall to form a substantially V-shape.

In this case, when the peripheral wall of the cover member is inserted into the mounting hole at the time of assembly, the contact surface of the insertion restricting portion becomes the outer curved surface of the burring portion after the removal restricting portion passes through the inner side of the burring portion. , and the contact surface of the removal restricting portion comes to contact the curved distal end portion of the burring portion. Therefore, when this configuration is adopted, by pushing the peripheral wall of the cover member into the mounting hole, the burring portion can be easily engaged with the insertion restricting portion and removal restricting portion of the cover member.

A guide surface (for example, the guide surface 15g of the embodiment) that is inclined toward the inner side of the peripheral wall toward the distal end side in the insertion direction is provided at a portion adjacent to the removal restricting portion on the distal end side in the insertion direction. You can do it.

In this case, when the peripheral wall of the cover member is inserted into the mounting hole during assembly, the guide surface comes into contact with the outer curved surface of the burring portion, and at this time, the peripheral wall of the cover member is guided by the inclination of the guide surface. position is fine-tuned. When the peripheral wall of the cover member is inserted into the mounting hole as it is, the insertion restricting portion and the removal restricting portion are brought into contact with the burring processed portion. Therefore, when this configuration is adopted, the attachment of the cover member to the attachment hole can be made easier.

The abutting surface of the removal restricting portion and the abutting surface of the insertion restricting portion may be in contact with the burring processing portion at one point on the same circumference of the peripheral wall.

In this case, since the contact surfaces of the detachment restricting portion and the insertion restricting portion each abut the burring portion at one point, variations in the curved shape and extension length of the burring portion are absorbed, and the detachment restricting portion and the insertion restricting portion are aligned. can be reliably brought into contact with the burring portion.

The burring portion may bite into a portion of the insertion restricting portion that contacts the burring portion.

In this case, since the burring portion bites into the contact surface of the insertion restricting portion when the cover member is assembled, variations in the curved shape and extension length of the burring portion can be absorbed by the biting. Therefore, when this configuration is adopted, rattling of the cover member can be further suppressed.

The insertion restricting portion may be constituted by a plate-like piece extending along the insertion direction of the peripheral wall toward the curved distal end side of the burring portion.

In this case, since the insertion restricting portion and the removal restricting portion are formed of plate-like pieces, it is possible to easily obtain a structure in which the burring portion bites into the contact surface.

A bottom wall (for example, the outward bottom wall 12 of the embodiment) is provided at the end of the peripheral wall in the insertion direction, and an outward flange (for example, the may extend from the outer flange 13), and the insertion restricting portion may be provided from the outer flange to the outer surface of the peripheral wall.

In this case, since the insertion restricting portion is provided from the outward flange to the outer surface of the peripheral wall, when the burring portion bites into the insertion restricting portion, the biting load can be reliably received by the outward flange and the peripheral wall of the cover member. can be done.

The biting restricting portion may be constituted by a plate-like piece extending along the insertion direction of the peripheral wall toward the curved distal end side of the burring portion.

In this case, since the biting restricting portion is composed of the plate-like piece, it is possible to easily obtain a structure in which the burring portion bites into the contact surface.

In the mounting portion structure of the cover member according to the present invention, the removal restricting portion and the insertion restricting portion are provided in the first engaging area of the peripheral wall of the cover member, and the second engaging area of the peripheral wall of the cover member is engaged in restricting. department is provided. Therefore, the displacement restricting function of the insertion restricting portion and removal restricting portion of the first locking area and the displacement restricting function of the biting restricting portion of the second locking area combine to allow the cover member to fit into the mounting hole. It becomes possible to firmly fix without rattling. Therefore, when the mounting portion structure of the cover member according to the present invention is employed, rattling between the cover member and the mounting hole can be suppressed, and the cover member can be easily mounted in the mounting hole.

The perspective view which shows the attachment part of the retractor of the vehicle of embodiment. FIG. 4 is a perspective view showing a plate member to which the cover member of the embodiment is attached; The perspective view which shows the plate member of embodiment. The perspective view which shows some cover members of embodiment. The perspective view which shows another part of cover member of embodiment. FIG. 3 is a cross-sectional view taken along line VI-VI of FIG. 2; FIG. 7 is a cross-sectional view similar to FIG. 6 in which the cross-sectional position is slightly shifted from the cross-sectional position of FIG. 6; FIG. 3 is a cross-sectional view taken along line VIII-VIII of FIG. 2; FIG. 9 is a cross-sectional view similar to FIG. 8 in which the cross-sectional position is slightly shifted from the cross-sectional position of FIG. 8;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. An arrow FR pointing to the front of the vehicle, an arrow UP pointing to the upper side of the vehicle, and an arrow LH pointing to the left side of the vehicle are shown at appropriate locations in the drawing. Further, in the following description, unless otherwise specified, terms such as front and rear, up and down, and left and right refer to front and back, up and down, and left and right with respect to the vehicle facing forward.

FIG. 1 is a perspective view showing the rear part of the rear seat of the vehicle of this embodiment.
Reference numeral 1 in FIG. 1 denotes a ring-shaped frame of the vehicle arranged behind rear seats (not shown), and reference numeral 2 denotes a rear wheel house arranged outside the ring-shaped frame 1 in the vehicle width direction. The annular frame 1 includes a pair of left and right side frames 1S standing upward from a position outside in the vehicle width direction, and an upper cross frame 1U connecting upper ends of the left and right side frames 1S. A metal support plate 3 is attached to the outer end in the vehicle width direction of the upper cross frame 1U. A cover member 6 made of metal is fixed to the support plate 3 to cover the periphery and the lower side of the retractor 5 of the seatbelt device 4 for the rear seat. In addition, in this embodiment, the support plate 3 constitutes a plate member.

2 is a perspective view showing the support plate 3 to which the cover member 6 is attached, and FIG. 3 is a perspective view of the support plate 3 alone.
The support plate 3 is made of a substantially trapezoidal metal plate whose outer side in the vehicle width direction is larger than its inner side. 7s, 7f and 7r are provided. Each joint flange 7s, 7f, 7r is joined to the upper cross frame 1U of the annular skeleton 1. As shown in FIG. The support plate 3 is attached to the upper cross frame 1U so that the plate main body 8, excluding the joint flanges 7s, 7f, and 7r, is substantially horizontal.

A plate body portion 8 of the support plate 3 is formed with a pentagonal mounting hole 9 that is distorted when viewed from above. The mounting holes 9 are continuous in a smooth circular arc with no corners in the circumferential direction. The periphery of the mounting hole 9 is burred from above. As a result, a burring processed portion 10 is provided on the periphery of the mounting hole 9 so that the distal end side (the side facing the inner side of the mounting hole 9) curves downward and extends.

The cover member 6 includes a peripheral wall 11 whose outer surface is slightly smaller than the mounting hole 9 of the support plate 3, a bottom wall 12 that closes the lower end of the peripheral wall 11, and an upper end portion of the peripheral wall 11 (outside the periphery of the peripheral wall 11). ), and an outward flange 13 that protrudes toward the center. The cover member 6 has the bottom wall 12 and the peripheral wall 11 inserted from above the mounting hole 9 of the support plate 3 , and the peripheral wall 11 is fixed to the burring processed portion 10 of the mounting hole 9 .
Hereinafter, the direction toward the curved distal end side of the burring portion 10 (downward) when inserting the peripheral wall 11 of the cover member 6 into the mounting hole 9 of the support plate 3 is referred to as the "insertion direction of the peripheral wall 11".

The outer peripheral surface of the peripheral wall 11 of the cover member 6 has a first locking area A1 abutting against the burring processed part 10, and a burring processed part at a position facing the first locking area A1 on the circumference of the peripheral wall 11. Abutting second locking areas A2 are provided.

4 is a perspective view showing the first engaging area A1 of the peripheral wall 11 of the cover member 6, and FIG. 5 is a perspective view showing the second engaging area A2 of the peripheral wall 11 of the cover member 6. FIG. 6 and 7 are cross-sectional views of the support plate 3 and the cover member 6 of the portion including the first locking area A1 of the peripheral wall 11, and FIGS. It is a sectional view of support plate 3 and cover member 6 of a portion containing stopping field A2.
A plurality of pairs (for example, two pairs) of upper ribs 14 and lower ribs 15 are provided in the first locking region A1 of the peripheral wall 11 of the cover member 6, as shown in FIG. A pair of the upper rib 14 and the lower rib 15 are arranged with a predetermined distance in the circumferential direction of the peripheral wall 11 . The upper rib 14 and the lower rib 15 are plate-shaped pieces extending along the insertion direction of the peripheral wall 11 and are formed integrally with the peripheral wall 11 from the same metal material as the peripheral wall 11 .

As shown in FIGS. 6 and 7 , the upper rib 14 is formed across the lower surface of the outward flange 13 of the cover member 6 and the outer surface of the upper region of the peripheral wall 11 . The upper rib 14 is formed in a substantially right-angled triangular shape when viewed from the side. The projecting end face of the upper rib 14 forms a flat contact surface 14 a extending obliquely downward from the lower surface of the outward flange 13 toward the outer surface of the peripheral wall 11 . The contact surface 14a is inclined inwardly of the peripheral wall 11 toward the distal end side of the peripheral wall 11 in the insertion direction. The curved outer surface 10a of the burring portion 10 on the support plate 3 side contacts the contact surface 14a. The contact surface 14a of the upper rib 14 allows the burring portion 10 to bite into when the curved outer surface 10a of the burring portion 10 is strongly pressed. The metal material forming the cover member 6 is softer than the metal material forming the support plate 3 .
In this embodiment, the upper rib 14 constitutes an insertion restricting portion whose displacement in the insertion direction is restricted by the burring processed portion 10 (curved outer surface 10a).

The lower ribs 15 are formed directly below the corresponding upper ribs 14 . As shown in FIGS. 6 and 7 , the lower rib 15 is formed to protrude outward from the outer surface of the peripheral wall 11 of the cover member 6 . The lower rib 15 is formed in a substantially triangular shape in a side view with the top projecting outward. At the end of the lower rib 15 in the protruding direction, there is a flat contact surface 15a that slopes downward from the upper end toward the outside of the peripheral wall 11, and a flat contact surface 15a that extends downward from the lower end of the contact surface 15a toward the inside of the peripheral wall 11. An inclined flat guide surface 15g is formed. The contact surface 15a of the lower rib 15 contacts the extended end 10e of the burring portion 10 on the support plate 3 side.
In the present embodiment, the upper part of the lower rib 15 centering on the contact surface 15a constitutes a removal restricting portion whose displacement in the removal direction is restricted by the burring processed portion 10 (extending end 10e).

Here, the upper rib 14 and the lower rib 15 are arranged with respect to the insertion direction of the peripheral wall 11, and the lower rib 15 is arranged on the tip end side of the upper rib 14 in the insertion direction. The contact surface 15a of the lower rib 15 and the contact surface 14a of the upper rib 14 face each other in a direction crossing the insertion direction of the peripheral wall 11 to form a substantially V shape. The substantially V-shape formed by the contact surfaces 15 a and 14 a is open toward the outside of the peripheral wall 11 . As shown in FIGS. 6 and 7, the contact surface 15a of the lower rib 15 and the contact surface 14a of the upper rib 14 are in contact with the burring portion 10 at the same peripheral position on the peripheral wall 11, respectively.

A guide surface 15g arranged adjacent to the lower end side of the contact surface 15a is inclined inward of the peripheral wall 11 toward the distal end side of the peripheral wall 11 in the insertion direction. When the peripheral wall 11 of the cover member 6 is inserted into the mounting hole 9 of the support plate 3, the guide surface 15g contacts the curved outer surface 10c of the burring portion 10 to guide the peripheral wall 11 of the cover member 6 into the mounting hole 9. to the appropriate position.

Moreover, as shown in FIG. 5, a plurality of ribs 20 are provided on the peripheral wall 11 of the cover member 6 at predetermined intervals in the circumferential direction of the peripheral wall 11 in the second locking area A2. The rib 20 is a plate-like piece extending along the insertion direction of the peripheral wall 11 and is formed integrally with the peripheral wall 11 from the same metal material as the peripheral wall 11 . An end surface of the rib 20 in the protruding direction is a flat contact surface 20 a extending obliquely downward from the lower surface of the outward flange 13 toward the outer surface of the peripheral wall 11 . The contact surface 20a is inclined inwardly of the peripheral wall 11 toward the distal end side of the peripheral wall 11 in the insertion direction. As shown in FIGS. 8 and 9, the contact surface 14a contacts the curved outer surface 10a of the burring processed portion 10 on the support plate 3 side. When the curved outer surface 10a of the burring portion 10 is strongly pressed, the contact surface 20a of the rib 20 restricts displacement of the peripheral wall 11 by the burring portion 10 biting into the contact surface 20a.
In this embodiment, a portion of the rib 20 centering on the contact surface 20a constitutes a biting restricting portion that restricts the displacement of the peripheral wall 11 by biting the burring processed portion 10. As shown in FIG.

In the above configuration, when fixing the cover member 6 to the mounting hole 9 of the support plate 3, the peripheral wall 11 of the cover member 6 is inserted into the mounting hole 9 so as to face the curved distal end side of the burring portion 10. do. At this time, the guide surface 15g of the lower rib 15 in the first engaging area A1 of the peripheral wall 11 and the lower area of the contact surface 20a of the second engaging area A2 come into contact with the curved outer surface 10c of the burring portion 10. Thus, the position of the peripheral wall 11 is adjusted to a proper position.

After that, when the peripheral wall 11 of the cover member 6 is pushed into the mounting hole 9, the contact surface 14a of the upper rib 14 abuts against the curved outer surface 10c of the burring portion 10 that has passed over the guide surface 15g of the lower rib 15. , the contact surface 14a of the upper rib 14 contacts the extended end 10e of the burring portion 10. As shown in FIG. At this time, the curved outer surface 10a of the burring portion 10 comes into contact with the contact surface 20a of the rib 20 in the second locking area A2 of the peripheral wall 11 . When the peripheral wall 11 is further pushed into the mounting hole 9 in this state, the burring portion 10 bites into the contact surface 20a of the rib 20 as shown in FIGS. , the burring portion 10 bites into the contact surface 14a of the upper rib 14, as shown in FIGS. As a result, the cover member 6 is controlled by the displacement control function of biting of the burring processed portion 10 in the second locking area A2 and the displacement control function of the upper rib 14 and the lower rib 15 in the second locking area A2. The displacement of the peripheral wall 11 of is strongly regulated.

In the mounting structure of the cover member 6 of the present embodiment, a contact surface 15a for restricting removal and a contact surface 14a for restricting insertion are provided in the first locking area A1 of the peripheral wall 11 of the cover member 6. A contact surface 20a, which is a bite restricting portion, is provided in the second locking area A2 of 11. As shown in FIG. Therefore, the contact surfaces 14a and 15a in the first engaging area A1 provide a vertical displacement regulating function, and the second engaging area A1 has a biting regulating function. It can be firmly fixed. Therefore, when the attachment portion structure of the present embodiment is employed, rattling between the cover member 6 and the attachment hole 9 can be suppressed, and the cover member 6 can be easily attached to the attachment hole 9 .

In addition, in the mounting structure of the cover member 6 of the present embodiment, the contact surface 20 of the rib 20 of the second locking area A2 is inclined inward of the peripheral wall 11 toward the insertion direction of the peripheral wall 11 . Therefore, when the peripheral wall 11 of the cover member 6 is inserted into the mounting hole 9 of the support plate 3, the contact position of the rib 20 with the burring processed portion 10 is displaced along the inclination of the contact surface 20 of the rib 20. The pressure contact force of the burring portion 10 against 20 gradually increases. Therefore, the burring portion 10 can be easily bitten into the contact surface 20a in the second locking area A2, and the cover member 6 can be easily attached to the attachment hole 9. As shown in FIG.
When the burring portion 10 satisfactorily bites into the contact surface 20a of the rib 20 in this way, it is possible to reliably prevent the cover member 6 from coming off from the mounting hole 9 and rattling.

In addition, in the structure of the mounting portion of the cover member 6 of the present embodiment, the contact surface 15a of the first locking area A1 on the removal restriction side is arranged on the distal end side in the insertion direction with respect to the contact surface 14a on the insertion restriction side, A contact surface 15a on the removal restriction side and a contact surface 14a on the insertion restriction side face each other in a direction intersecting the insertion direction of the peripheral wall 11 and form a substantially V-shape. Therefore, when the peripheral wall 11 of the cover member 6 is inserted into the mounting hole 9 at the time of assembly, the contact surface 15a for restricting removal passes through the inside of the curved outer surface 10c of the burring processed portion 10, and then the insertion restriction. The abutment surface 14a for the burring portion 10 abuts the curved outer surface 10c of the burring portion 10, and the abutment surface 15a for restricting coming-off abuts the extended end 10e of the burring portion 10. As shown in FIG. Therefore, when this configuration is employed, the burring portion 10 can be easily engaged with the contact surface 14 a for restricting insertion and the contact surface 15 a for restricting removal of the cover member 6 .

Further, in the structure of the mounting portion of the cover member 6 of the present embodiment, a guide surface 15g is provided at a position adjacent to the contact surface 15a for restricting coming off of the first locking area A1. Therefore, when the peripheral wall 11 of the cover member 6 is inserted into the mounting hole 9 of the support plate 3, the guide surface 15g can guide the cover member 6 to a proper position. Therefore, when this configuration is adopted, the attachment of the cover member 6 to the attachment hole 9 can be made easier.

Further, in the structure of the mounting portion of the cover member 6 of the present embodiment, the contact surface 15a for restricting removal and the contact surface 14a for restricting insertion are positioned on the peripheral wall 11 at the same position on the circumference of the peripheral wall 11 so as to be attached to the burring processed portion 10 respectively. touch at one point. As a result, the contact surface 15a for restricting removal and the contact surface 14a for restricting insertion can reliably contact the burring portion 10 while absorbing variations in the curved shape and extension length of the burring portion 10. can be made

In the mounting portion structure of the cover member 6 of the present embodiment, the burring portion 10 bites into the contact surface 14a for restricting insertion. Therefore, the burring portion 10 bites into the contact surface 14 for restricting insertion, so that variations in the curved shape and extension length of the burring portion 10 can be absorbed. Therefore, when this configuration is adopted, rattling of the cover member 6 can be further suppressed.

Further, in this embodiment, the contact surface 14 a for restricting insertion is formed on the upper rib 14 which is a plate-like piece extending along the insertion direction of the peripheral wall 11 . Therefore, it is possible to easily obtain a structure in which the burring portion 10 bites into the contact surface 14a.

In addition, in the mounting structure of the cover member 6 of the present embodiment, the contact surface 14a for restricting insertion of the first locking area A1 is provided from the outward flange 13 of the cover member 6 to the outer surface of the peripheral wall 11. there is Therefore, when the burring portion 10 bites into the insertion restricting abutment surface 14 , the biting load can be reliably received by the outward flange 13 and the peripheral wall 11 of the cover member 6 . Therefore, when this configuration is employed, the burring processed portion 10 can be reliably bitten into the contact surface 14a.

In addition, in the mounting portion structure of the cover member 6 of the present embodiment, the rib 20 which is a plate-like piece extending along the insertion direction of the peripheral wall 11 has the contact surface 20a for holding down the bite of the second locking area A2. is formed in Therefore, it is possible to easily obtain a structure in which the burring portion bites into the contact surface.

The present invention is not limited to the above-described embodiments, and various design changes are possible without departing from the gist of the present invention.

3 ... Support plate (plate member)
6... Cover member 9... Mounting hole 10... Burring processed part 10c... Curved outer surface 10e... Extending end 11... Peripheral wall 12... Bottom wall 13... Outward flange 14... Upper rib (insertion restricting part)
14a... Contact surface 15... Lower rib (disengagement restricting portion)
15a... Abutment surface 15g... Guide surface 20... Rib (bite regulation part)
20a... Contact surface A1... First locking area A2... Second locking area

Claims (9)

a plate member having a mounting hole;
a cover member having a peripheral wall, the peripheral wall being fixed to the mounting hole;
The mounting hole has a curved burring portion on the peripheral edge,
On the outer peripheral surface of the peripheral wall, there are provided a first engaging area that abuts on the burring portion, and a second engaging area that abuts on the burring portion at a position facing the first engaging area on the circumference of the peripheral wall. a locking region is provided;
The first locking region is provided with a removal restricting portion that abuts on the extended end of the burring portion, and an insertion restricting portion that abuts on the curved outer surface of the burring portion,
The mounting structure of the cover member, wherein the second engaging region is provided with a bite restricting portion that restricts the displacement of the peripheral wall by being bitten by the burring processed portion. The contact surface of the bite restricting portion with the burring portion is inclined toward the inner side of the peripheral wall with respect to the insertion direction of the peripheral wall toward the curved distal end side of the burring portion. Item 2. Attachment structure of the cover member according to item 1. The removal restricting portion and the insertion restricting portion are arranged in relation to the insertion direction of the peripheral wall toward the curved distal end side of the burring portion, and the removal restricting portion is disposed on the distal end side of the insertion restricting portion in the insertion direction,
The contact surface of the removal restricting portion that contacts the extended end of the burring portion and the contact surface of the insertion restricting portion that contacts the curved outer surface of the burring portion are arranged in the insertion direction of the peripheral wall. 2. The mounting structure of the cover member according to claim 1, wherein the mounting portion structure of the cover member is provided so as to face each other in a direction intersecting with and form a substantially V-shape. 3. A guide surface slanted toward the inner side of the peripheral wall toward the distal end side in the insertion direction is provided at a portion adjacent to the distal end side of the removal restricting portion in the insertion direction. 3. Mounting structure of the cover member according to 1. 3. The contact surface of the removal restricting portion and the contact surface of the insertion restricting portion are in contact with the burring portion at one point on the same circumference of the peripheral wall. 4. Attachment structure of the cover member according to 3. 2. The mounting structure of a cover member according to claim 1, wherein said burring portion bites into a contact portion of said insertion restricting portion with said burring portion. 2. The mounting of the cover member according to claim 1, wherein the insertion restricting portion is formed of a plate-like piece extending along the direction of insertion of the peripheral wall toward the curved distal end side of the burring portion. department structure. A bottom wall is provided at the end of the peripheral wall in the insertion direction, and an outward flange is provided at the end of the peripheral wall opposite to the insertion direction,
8. The mounting structure of the cover member according to claim 7, wherein the insertion restricting portion is provided from the outward flange to the outer surface of the peripheral wall. 9. The mounting of the cover member according to claim 8, wherein the biting restricting portion is composed of a plate-like piece extending along the direction of insertion of the peripheral wall toward the curved distal end side of the burring portion. department structure.

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